Cooper s bevel



(Modrel.)

` J. F. LONERGAN.

Y COOPERS -BBVBL.. K N6. 270,086. Patented Ja11.12,`18|83.

WITNEssEs: Y

ATTORNEYS.

N. PETERS. Phewwmgrapmr. wnmngtm D. c.

To all whom it may concern:

vUNITED STATES l PATENT OFFICE.

JOHN F. LONERGAN, OF ST. LOUIS, MISSOURI.

COOPERS BEVEL.

SPECIFICATION forming part of Letters Patent No., 270,086, dated January2, 1883.

4 Application tiled September V1, 1882. (Model.) I

Be it known that I,`JoHN F. LONERGAN, of St. Louis and Stateof Missouri.lhave invented a new and Improved Coopers Bevel, ot' which the followingis a full, clear, and exact description.

My invention relates to hevels used by coop ers in the manufacture ot'tub's and tanks for jointing the stares'. 4

The object of the invention is to furnish an instrument by which theangles necessary in a great variety of sizes may be obtained, so as toavoid the necessity ot' a separate instrument for each size ot' tub ortank.

The invention consists in an adjustable bevel constructed as hereinafterdescribed and claimed. s l

Reference is to be had to the accompanying drawings, t'ormin gapartofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of my improved lieveling-instrument. Fig. 2is a detail section at thejoint of the arm. Fig. 3 shows the instrumentfitted for use as a try-square.

The instrument consists of two blades, A and B, which may be of wood ormetal, preferably the latter, the blade A being what I term the base77ot'theinstrument, and the blade B the adjustable arm.7 The base A isformed with two parallel and longitudinal slots, a, at one of its ends,and the arm B is made with two similar slots, b. The arm is attached byscrews c, passing through the slots, and held by clampingnnts du Thisconstruction is to allow of the adjustment o t' the arm upon the base atright angles or in any position in the length ot the slots as` may bedesired.

As a guide for the adjustment oi' the arm B, the baseA is marked withcross-lines e. The

angles of these lines tov the side of the base varies, each one beingfor a different sizetub or tan k-from two feet to ten feet,more orlessso that when the arm is placed upon either of these-lines its angleto the base corresponds to the angle required for joining the staves inthat size ot' tank. The lines arenumbered for both the diameter andcircumference for each size.

In beveling the staves the operator works from.the diameter. rlhecircumference sizes are tity ot'lmaterial required for the tank. Theinside edge of the baseA is curved or beveled as shown, so that `thebevel may he applied directlyto the outside edge of the sta'ven case thestave should be rough or \varped. This prevents the bevel from rockingon the stave, and secures uniformity ot the bevel in the length ot' `thestave.

The use ot' this instrument secures uniformity and accuracy in thejoining of staves for tubs and tanks. It may also be used asa trysquareby setting the arm Bat right angles to the back or straight edge of thebase, as shown in Fig.3,and used as a carpenters bevel. The bevels areto be made in three sizes-the rst size i'or tubs from two to ten feet indiameter, the second from ten to twenty feet., and the third from twentyto thirty feet.

Having thus described myinvention, I claim as new and desire to secureby Letters Patelli-` 1. The coopersbevel consistingot' the L- shapedinstrument, with its leg or base A provided with parallel longitudinalslots a and graduations c, and its foot or arm B provided with parallellongitudinal slots b and setscrews d d, said arm or foot being capableot' adjustment at different angles to the leg or base A, as shown anddescribed, and for the purpose set forth.

2. The combination of the base A, formed with slots a a, the slotted armB, and clampingfscrews, substantially as shown and described, fcr use inthe-manner specilied.

y JOHN F.- LONERGAN.

Witnesses:

PHIL. HENCKLER,

FREDK. Go'r'rscHALK. l

applied for commerce in estimating the quan-

